Transfer sheet arrangement, particularly for use in typewriters or the like



June 6, 1939. w DQUGLAS 2,161,144 TRANSFER SHEET ARRANGEMENT,PARTICULARLY FOR USE IN TYPEWRITERS OR THE LIKE Filed Oct. 10, 1936 2Sheets-Sheet l j'nvenior WILLIFIM DQUGLRS W. DOUGLAS TRANSFER SHEETARRANGEMENT, PA

2,161,144 RTICULARLY FOR USE IN TYPEWRITERS OR TH June 6, 1939.

E LIKE Filed Oct. 10, 1936 2 Sheets-Sheet 2 Q h M r .A J T M U udo WPatented June 6, 1939 UNI E S- TATES TRANSFER sHEET TICULARLY FoR R, THELIKE- PATENT: OFFICE ARRANGEMENT, PAR- USE IN TYPEWRITERS WilliamDouglas, Whitstable, England Application October 10, 1936, Serial No.104,971 g In Great Britain October 16, 1935 2 Claims.

' plied. either as a set of superposed webs, termed the interfoldsystem, or as a single continuous web folded a plurality of timeslongitudinally, termed the fanfold system.

Continuous copy sheetsare sometimes supplied with carbon transfersheets, of the same length already interleaved therewith. Also thecarbon sheets of limited length are separately supplied for interleavingwith continuous'co-py sheets, the carbonsheets having loops atone endfor the reception of the transverse bladesof an anchoring or retractingdevice, according tothe kind of typewriting. machine employed.

Superposed carbon transfer sheets are also supplied secured by bothlateral borders to a backing sheet whereby the individual copy sheets ofan interfold set of sheets can be inserted between the individual carbonsheets and displaced longitudinally relatively thereto. p

The object of the present invention is to provide an interconnected setof carbon transfer sheets capable of being inserted between copy sheets,continuous Web or otherwise, and manipulated together therewith.

For the above purpose, according to the invention, a set of superposedcarbon transfer sheets is secured to a backing sheet along only onelateral border, means being provided for holding the set of superposedcarbon transfer sheets also along a transverse border. Thus whilst thesecuring to the backing sheet along the lateral border ensures thecorrect superimposition of the carbon sheets, the holding along thetransverse border enables the set of carbon sheets with interleaved copysheets to be easily inserted into an ordinary typewriter, or to bedisplaced longitudinally relatively to each other, as the case may be.

To enable the interconnected set of carbon transfer sheets to beinterleaved with fanfold copy sheets, some of the set of superposedcarbon transfer sheets are secured to the backing sheet only along theone lateral border whereas the remainder are secured thereto only alongthe other lateral border. Thus a folder is produced consisting of thebacking sheet with carbon sheets opening out therefrom towards the oneside and 7 also carbon sheets opening out towards the other side. Withsuch a folder all systems of manifold copy sheets can be interleavedwith and. positioned relatively to the carbon sheets. 7

Continuous interfold copy sheets can obviously be interleaved with thecarbon sheets.

Fanfold copy sheets can be interleaved by closing inwards a carbon sheetfrom the side adjoining the respective opening of the fanfold.

The carbon sheets need not be directly attached tothe backing sheetalong the respective lateral border, but each may be secured theretothrough I the medium of a sheet of uncarbonised paper attached forinstance to the carbon sheet along a transverse border and attachedalong the respective lateral border to the backing sheet. Ihese sheetsof paper may each have an extension, to

be torn-off before typing is commenced, covering the entire operativesurface of the carbon sheet, to shield interleaved copy sheets frombecoming smudged in packing or storage by the carbon.

The uncarbonised paper sheets may be integral uncarbonised portions ofthe paper web of the carbon sheets, folded over to form loops andextending the full length of the carbonised portions. With continuouswebs, the carbon sheets have loops along the appropriate transverseborder for the insertion of the above mentioned transverse anchoring orretracting blades. To facilitate insertion, these blades are mounted,for instance on blocks, removable in sets from a base, one block withits set of blades being on each side of the path of the sheets.

The invention is illustrated more or less diagrammatically and by way ofexample, on the accompanying drawings, in which:

Fig. 1 is a broken plan of a set of carbon transfer sheets indirectlyattached to a backing sheet and provided with anchoring or retractingloops, and

Fig. 2 is an expanded broken end view thereof with a. set of interleavedfanfold copy sheets.

Referring to Figs. 1 and 2, a is a backing sheet of stout paper. b arecarbon transfer sheets, securedto the backing sheet a some at onelateral border and others at the opposite lateral border.

As shown, the carbon sheets b, although secured to a backing sheet asome along one lateral border whilst the others are secured along theother lateral border, need not be directly attached to the backing sheeta, but can be attached thereto through the medium of uncarbonised papersheets 6. Each of these paper sheets e is attached to a transverseborder of the respective carbon sheet b, or may be an uncarbonisedintegral extension thereof. The paper sheets e are folded over to formtransverse loops 1, and each extends over its respective carbon sheet b.The paper sheets e may extend the full length of the carbon sheets I) toprevent the latter smudging interleaved copy sheets when packed or instorage. The extensions of the paper sheets e are torn off, preferablyat a suitably situated line of perforations, when the assemblage ofcarbon and copy sheets is to be used in the typewriter. An assemblage ofcarbon sheets 17 and paper covering sheets e interleaved With a set offanfold copy sheets d is illustrated in a diagrammatic expanded mannerin Fig. 2.

The loops f serve to anchor or retract the carbon sheets b to enable aset of continuous web copy sheets, such as a fanfold set d, and thecarbon sheets b to be relatively displaced longitudinally.

It is here explained that in flat bed platen typewriting machines themachine moves over the forms and the carbon sheets are anchored and theinterleaved continuous copy sheets are pulled therethrough, when a typedset of forms is to be detached from the web or webs, whereas in acylinder platen typewriting machine the carbon sheets and continuouscopy sheets are conjointly displaced in typing and the carbons areretracted relatively to the copy sheets when the typed forms are to bedetached.

To anchor the carbon sheets I) or to enable them to be retracted as thecase may be, blades are inserted in the loops corners f of the paperbeing folded back or cut away to facilitate insertion of the blades.These blades extend transversely across the usual longitudinal frame,along which the assemblage of carbon sheets b and copy sheets at isextended on its passage to the typewriting machine (not shown). Some ofthese blades g extend from one side others from the other side of theframe.

The blades are mounted by one end in stepped blocks, there being oneblock at each side.

On detachment of the blocks, the blades can be inserted as a set or gangin the respective loops 1, which can be effected far more quickly thanwith separately removable blades.

The construction shown may be considered as and can be constituted by,two overlapped backing sheets a, but each with carbon transfer sheets 11secured to a different lateral border, and either section may be usedalone, with a single set of blades, or together with two sets of blades.This alternative provides a method of inserting the transfer sheets intocontinuous fanfold webs from an open end of the latter if the blades arepreinserted in the loops of the transfer sheets. A single detachablebacking sheet would perform the same function as two overlapping backingsheets, to serve as a medium positioning the lateral borders of thetransfer sheets. Such backing sheet may be of a permanent nature and maybe composed of more or less rigid material, such as synthetic resin,Celluloid, metal or the like, to which the lateral borders of thetransfer sheets may be secured in any suitable manner, and may beconsiderably reduced in length so that it may even become a narrowtransverse bar.

The carbon transfer sheets used in continuous form machines are usuallysupplied with uncarbonised looped head portions. The looped headportions of carbon transfer sheets when arranged according to thepresent invention are preferably also uncarbonised. They may even be ofmore durable material than uncarbonised paper, and may for instance besheets of cellulose derivative composition and be used repeatedly withrenewed carbonised paper extensions.

I claim:

1. A set of superposed carbon transfer sheets secured together at onlyone lateral border and adjacent to a transverse border, each sheethaving along said transverse border a folded-over transverse loopportion.

2. In combination, a backing sheet, and a. set of superposed carbontransfer sheets secured to said backing sheet some only at one lateralborder and the remainder only at the other lateral border and adjacentto a transverse border, each sheet having along said transverse border afolded-over transverse loop portion.

WILLIAM DOUGLAS.

